Dobby with more than one patterncard cylinder



H. sTAuBu Nov. 21, 1939.

DOBBY WITH MORE THAN ONE PATTERN-CARD CYLINDER Filed May 2, 193a far Patented Nov. 21 1939 UNlTED STATES DOBBY WITH MORE THAN ONE PATTERN- OARD CYLINDER Hugo Staubli, Zurich,

Switzerland, assignor to Gebr. Stiiubli & 00., Horgen, Canton of Zurich, 7 7

Switzerland Application May 2, 1938, Serial No. 205,580

" In Switzerland May 11,1937

6 Claims.

l inders are provided. The number of parts required between the pattern-card cylinders and the hooks is thereby quite considerably diminished, and the view of the cylinders, which in known machines is seriously impaired by the reading device being continually located above the cylinders, is free. The afore-mentioned reduction of the number of parts to a minimum enables the speed of working to be increased, the pressure of the reading needles upon the pattern card, when they do not meet a pick hole in the latter, being so small that Verdols paper or some similar thin light material can be used for the pattern card. These various advantages are attained according to the invention owing to the fact that a rack or frame for example, which guides the reading needles, is reversibly arranged, so that the reading needles can be brought from one pattern-card cylinder to the other for the purpose of reading the pattern. The invention is illustrated by way of example in the accompanying drawing, in which Figure 1 shows a two-cylinder dobby, with rockable reading device, in side elevation;

Figure 2 is a similar view of a dobby with a slidable reading device.

In the drawing, the reading needles ai, arranged in two rows one behind the other, are guided in all three embodiments, in two bars 5', which, with two screws t connecting them with one an- 0 other, form a frame which is rockable about a pivot b. Upon the pivot 12 is mounted fast a two-armed lever d, which carries on one arm a roller e, which is pressed by a tension spring 7 attached to the other arm against the periphery of a four-cornered cam disc 9. This cam disc receives at certain intervals of time from a change mechanism, not shown, a rotation through 45. In the form of construction illustrated in Figure 1, the frame 8, t is thrown over by this rotation each time from one of the pattern-card cylinders 71., z to the other. The position of the reading needles after the transposition is indicated by dot-and-dash lines. The reading needles are suspended loosely from small rods or pins k, which are carried loosely by a pivot l, upon which is secured a bent member or stirrup u, engaging through underneath the pins 7c. The pivot Z receives, from a cam m, angular movements, which, by means of the stirrup u, effect a raising of the reading needles.

The reading device, instead of being rockable, as shown, may be made slidable from one cylinder to the other. A construction of this nature is illustrated by Figure 2. Here the lever d carries a third arm 0, which, at its lower end, by means 10 of an elongated slot, embraces the journal :i of a roller 11, which is mounted on a carriage 1; having a vertical member formed by the frame .9, while its horizontal part is guided by means of the rollers n and n in a slot p in the frame 15 or end plate of the machine. A rocking of the lever d therefore occasions a displacement of the reading device from one of the cylinders h, i to the other, the vertical position of the reading needles being maintained.

Instead of the cam disc 9 a so-called closed eccentric or positive tappet may be employed in all forms of construction, that is to say, a cam constructed with a guide groove or the like for the roller e. In this case the spring is unnec- 25 essary.

A machine according to the invention is preferably built as a double-lift dobby, as assumed in the drawing, but may alternatively be constructed as a single-lift machine.

A device built according to the invention admits of being applied to dobbies with more than two pattern-card cylinders, that is to say, the same needlesmay be caused to read more than two pattern cards.

What I claim is:

1. A dobby comprising more than one patterncard cylinder for pattern-cards of pasteboard, Verdo-ls' paper or other thin material, a movable set of pick-reading needles and a device adapted 40 to change over said set of needles alternately from one pattern-card cylinder to another.

2. A dobby comprising more than one patterncard cylinder for pattern-cards of thin material,-

a frame rockable about a horizontal pivot located 5 above said pattern-card cylinders, pick-reading needles slidably mounted in said frame in radial direction relatively to its pivot, and a mechanism adapted to impart a reciprocating rocking movement to said frame so as to bring said pick-reading needles alternately to a position to read the picks on one or another of said pattern-cards.

3. A dobby comprising more than one patterncard cylinder for pattern-cards of thin light material, a carriage having an upstanding arm,

formed by a frame, pick-reading needles slidably guided in parallel bars of this frame and a mechanism for displacing said carriage in horizontal direction and to bring the pick-reading needles alternately above one and the other of said pattern-card cylinders.

4. A dobby comprising more than one patterncard cylinder, a carriage located above these cylinders and adapted to be displaced in horizontal direction from one of these cylinders to another, a rocking lever connected with said carriage by a slot connection and adapted to impart to it a reciprocating motion, and a series of pick-reading needles adapted to be displaced in said carriage in vertical direction so as to alternately read the picks on one and the other of said pattern-card cylinders.

5. A dobby comprising more than one patterncard cylinder, for pattern cards of pasteboard,

Verdols paper or other thin material, a lever mounted on a pivot above said cylinders parallel thereto, a frame like pick reading device fixed on said pivot, a temporarily rotating cam disc adapted to impart reciprocating oscillating movements to said rocking lever so as to bring said pick reading device alternately over one and another of said pattern-card cylinders.

6. A dobby comprising more than one stationary pattern-card cylinder, a pick-reading device above these cylinders, a rocking lever adapted to bring said pick-reading device alternately over one or another of said cylinders, and a temporarily rotating cam disk engaging With said rocking lever so as to impart oscillating movements thereto and to bring the pick-reading device over the other of said cylinders so as to allow the picks of another pattern-card to be read.

HUGO STZSUBLI. 

